Poly Network

What happened

• Poly Network, a defi protocol, lost $611.0M on August 10, 2021.

• The largest of the 127 incidents recorded in 2021: 21% of the $2.87B lost to hacks that year.

• One other incident was recorded the same day: Punk Protocol ($8.9M).

• The first of 2 recorded incidents at Poly Network; the next followed in July 2023, $5.0M.

• Improper Access Control is behind 142 recorded incidents totalling $1.19B; this is the largest of them.

Cite this record

Monitoring Room, "Poly Network hack (2021) — $611.0M stolen", incident record, data: DefiLlama hacks dataset, as of 2026-10-25 08:00 UTC. https://monitoringroom.com/situation/crypto-hack/poly-network

Other recorded incidents at Poly Network

DefiLlama records 2 separate incidents under this name.

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